{ "currentVersion": 10.81, "id": 10, "name": "Indian River County 2002-2004 Manatee Distribution Survey Observations", "type": "Feature Layer", "description": "For a full FGDC compliant metadata record, please click here. <\/a> <\/p>\n\nAerial distributional surveys are used by marine mammal biologists from FWC and other agencies to determine the seasonal distribution of manatees. Most surveys are conducted from small, four-seat, high-winged airplanes (Cessna 172 or 182) flying at a height of 500-1000 ft at a speed of 70-90 knots. Small helicopters may be used instead of fixed wing aircraft in urban areas or where waters are particularly opaque and hovering may be required. Flights are usually three to five hours long and are most commonly flown every two weeks for two years. The surveys are designed to maximize the manatee counts by concentrating on shallow nearshore waters where manatees and their primary food source, sea grasses, are located. Flight paths curve along parallel to the shoreline, and the airplane circles when manatees are spotted until a count of the number of animals in each group is obtained. Offshore waters are usually not surveyed. Dolphin and sea turtles are recorded opportunistically. All aerial data are recorded on paper maps and entered into a GIS shapefile for spatial analysis. GIS is a computer software system for representing data spatially and for conducting spatial analyses. Surveys of Indian River County surveys were flown twice a month from July 2002 to July 2004 by FWC staff memebers. Survey area included the Atlantic Coast, Intracoastal Waterway and small tributaries of Indian River County. 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